By Voyiadjis G.Z., Ju J.W., Chaboche J.-L.
This ebook comprises thirty peer-reviewed papers which are according to the displays made on the symposium on ''Damage Mechanics in Engineering Materials'' at the party of the Joint ASME/ASCE/SES Mechanics convention (McNU97), held in Evanston, Illinois, June 28-July 2, 1997. the most important region of dialogue used to be at the constitutive modeling of wear and tear mechanics in engineering fabrics encompassing the subsequent themes: macromechanics/micromechanical constitutive modeling, experimental tactics, numerical modeling, inelastic habit, interfaces, harm, fracture, failure, computational equipment.
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Extra resources for Damage Mechanics in Engineering Materials
1. Kattan, 1990. "A coupled theory of damage mechanics and finite strain elasto-plasticity II. Damage and finite strain plasticity ", Int. J. Engng. , 28: 505524. 15. Yazdani, S. 1993. "On a class of continuum damage mechanics theories ", Int. J. , 2:162-176. 16. Murakami, S. and K. Kamiya, 1997. "Constitutive and Damage evolution Equations of Elastic-Plastic-Brittle Materials Based on Irreversible Thermodynamics ", Int. J. Mech. , 39: 473-486. 44 17. , S. Murakami and Y. Liu, "Irreversible thermodynamics theory for elasticplastic-damage materials", Euro.
0 Fig. 1 shows the comparison between the experimental uniaxial stress-strain relation and the corresponding prediction by equations (6), (13), (14), (20)and (21). It can be seen that the experimental result can be precisely described by the present theory. 285 ..... 16 Axial strain Fig. 1 Experimental and calculated stress-strain curves under uniaxial tension. 35 axial strain. 5% increment of strain on the corresponding stress-strain curve . 2, the decrease in the experimental results of E l is observed due to internal damage, and E 1 attains to about 90% of its initial value at failure.
6. 6 Calculation of Multipliers When damage and plasticity occur simultaneously, the multipliers AP and JV must be obtained by solving simultaneously the consistency condition for the plastic yield surface and the damage surface as follows " OF-~P"dr dR dr OD (dR)(dB d r dfl OFd . Ou ') 3D 3Y (23) (24) 34 3. 1 S p e c i m e n of S p h e r o i d i z e d Graphite Cast I r o n Tubular specimens of spheroidized graphite cast iron FCIM00 (JIS) were employed in the present experiments. The wall thickness of the specimen is 1 mm, and may be sufficiently thick to ensure the continuum assumption because the average diameter of spheroidized graphite particles is about 30/xm.
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